<template>
    <div class="list" ref="wrapper"> 
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" 
                    :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" 
            v-for="(item,key) of cities" 
            :key="key" 
            :ref ="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-lisit">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                    >{{innerItem.name}}</div>
                </div>
                
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState ,mapMutations} from 'vuex'
export default {
    name:'CityList',
    props:{
        hot: Array,
        cities : Object,
        letter: String
    },
    computed :{
        ...mapState({
            currentCity: 'city'
        })
    },
    methods:{
        handleCityClick(city) {
            // this.$store.commit('changeCity',city)
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
        this.scroll= new Bscroll(this.$refs.wrapper)
    },
    watch :{
        letter () {
            if(this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    }
    
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl';
    .border-topbottom
        &:before
            border-color:#ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color:#ccc
    .list
       position :absolute
       overflow :hidden
       top: 1.58rem
       left :0
       right :0 
       bottom :0
    .title
        line-height :.54rem
        background :#eee
        padding-left :.26rem
        color: #666
   .button-list
        padding :.1rem .6rem .1rem .1rem
        overflow :hidden
        .button-wrapper
            float :left
            width: 33.33%
            .button
                margin  :.1rem
                text-align :center
                border : .02rem solid #ccc
                padding :.1rem 0
                border-radius :.06rem
    .item-lisit
        line-height :.76rem
        color: #666
        padding-left :.2rem
</style>
